Ventilating unit



W. SHURTLEFF. VENTILATING UNIT.

I I I I I APPLICATION FILED JUNE 25, 1920.

Patented Dec. 5, 1922.

Ii" I Patented Dec. 5, 1922.

nire srarps WILFREI) SI-IURTLEFF, OF IVIOLINE, ILLINOIS, ASSIGNOR TOMOLINE HEAT, OF MOLIN E,

PAIENT @FFICEL ILLINOIS, A CORPORATION 0F ILLINOIS.

VENTILATING UNIT.

Original application filed March 10, 1919, Serial No. 281,800. Dividedand this application filed June 25, 1920. Serial No. 391,751.

State of Illinois, have invented certain new and useful Improvements inVentilating Units, of which the following is a specifica-- tion.

My invention rela-tes to Ventilating units of that class in which air isdrawn in from the outside and circulated in contact with heatingelements before delivery to the room to be served.

@ne of the important objects of my invention is to dispense with aircleaning mechanism involving the use of water, and to provide improvedmeans for dry cleaning the air before it is delivered. rIhe subjectmatter of the present invention is a division of a prior application,filed by me on March 10th, 1919,` and bearing Serial No. 281,800.

rlhe above and other features of my invention are clearly disclosed onthe aecompanying drawing, in which- Ifig. 1 is a vertical sectional viewof my improved unit, and

Fig. 2 is a perspective view showing one of the louvres for separatingdust from the air.

'Ihe unit shown comprises the housing 5l youtlet 10 extends downwardlythrough the oor 6 to communicate with the heating chamber 11. The frontwall 12 of the heating chamber is set a distance forwardly of the frontwall 13 of the chamber 7 so as to leave the outlet 14.

Within the heating chamber 11 are supported two radiator structures 15and 16 which are separated by a partition 17 rIhis partition is of aboutthe same height as the radiator structures, and on a pivot rod 18extending along the top of the partition is secured the damper 19 forcontrolling the outlet 14. rIhis damper may swing from its upperposition against the floor 7 to a lower position against the bracket 20secured to the Wall 12. The counter-weight 21 is adjustable on the arm22 extending from the damper and tends to swing the damper upwardly.Secured to the front wall 12 is some suitable thermostatic device 23whose operating lever 24 connects with the cord 25 which extends aroundthe idler pulley 26 and is adapted for connection with the damper bymeans of the hook 27 and the eye 28.

The operation thus far is apparent, the blower draws in the air from theoutside through the duct 8 and forces it downwardly into the heatingchamber 11. If the temperature in the room to be served is below normalthe thermostat and counter-weight have co-operated to keep the damper 19up so as to prevent direct connection of the outlet 14 with the bloweroutlet. the blower is therefore forced downwardly past and into contactwith the radiator structure 15, and then upwardly in contact with theradiator structure 16 and into the outlet 14 into the room, the airbeing thus heated. If the temperature of the room is very high when thedevice is started the damper 19 will be held in its lower position sothat all the air from .the blower will be forced directly through theoutlet 14 into the room until the room is sufficiently cooled.

After starting of the device and during its normal operation thethermostat and counter-weight co-operate to so adjust the damper in theoutlet 14 that the proper amount of direct cold air and warmed air willbe discharged into the room.

It is desirable to clean the air before it is delivered from the deviceinto the room. In prior structures cleaning mechanism involving waterpans have been used and very eiiicient cleaning is accomplished so longas the water pans are kept properly supplied with water. However, inpractice, the caretaker will not always keep the reservoirs or panslilled with water and these washing systems are then of course, useless.I have therefore provided an improved mechanism for efliciently drycleaning the air. rl`he mechanism involves the use of louvres forbaffles between the radiator structures and floor of the device againstwhich the dust laden air impinges` and the dust and dirt particles areseparated therefrom.

Referring to the drawing, a row of louvre sections 2,9 form a baillewall between the space 30 directly below the radiators and The cold airfrom the dead space 31 above the floor 32. These louvre sections areoverlapped slightly to leave the passageways 33, and each section hasalso stamped therefrom the baflie flanges 34 for leaving passageways 35.The louvre sections and the baffle flanges extend at such angles thatthey will readily catch dust and dirt particles and deflect themdownwardly through the passageways 33 and 35 into the space 31. Afterthe air passes downwardly through the radiator structure 15 to be warmedit strikes the louvres and the dust and dirt is separated therefrom inthemanner referred to. Preferably the wall formed by the louvres isrounded as shown so that the air is gradually guided from the radiator15 to the radiator 16 and the friction thereby reduced and theefficiency of the machine increased.

The radiator structure 15 receives the full' impact of the air forceddownwardly by the blower 9' and particularly when the air is cold therewill be a tendency for the radiator 15 to be so chilled at its upper endthat any steam attempting to enter is immediately condensed and the endsof the radiator sections will be filled with cold air which blockscirculation. This, of course, subtracts just that much heating area fromthe radiator structure.

Another feature of my invention is therefore to provide an arrangementfor insuring rapid and uniform circulation through the radiatorsections. Preferably the radiator sections 15 and 16 are individualcomlete structures. As shown, steam enters rom 'supply pipe 36 into theradiator 15 at' the bottom and one end thereof, this pipe 37 connectingthe other ends of the radiators at the bottoms thereof while the pipe 38receives the outflowing steam. The radiator 15 which is in the directpath of the cold air from the blower, therefore receives the hot steam,.and the steam can readily circulate through the radiator sections andcompletely ll it, thus eliminating any chances for the formation of coldair pockets. The steam then flows through the' pipe 37 and Acirculatesthrough the radiator 16 and then iframes out through the pipe 38. Avalve 39 is provided for controlling the in fiow of steam and on theradiator 16 an air vent 40 is preferably provided.

The above arrangement f radiators has proven very efficient, cold airpockets and checking of the circulation being eliminated, the radiatorbeing uniformly heated by the steam so that the maximum heating area isprovided for heating the air.

This eficient heating arrangement together with the automatic control ofthe outlet damper and the simplified air cleaning arrangementv make thedevice very eiiicient in its operation.

I do not desire to be limited to the exact construction and arrangementshown and described, as changes can no doubt be made which will stillcome within the scope of my invention.

I claim as my invention:

1. In a Ventilating unit, the combination of a housing having air inletand outlet openings, a heating element within the housing, means fordirecting the air downe wardly and upwardly through said heatingelement, anda dust separator comprising a plurality of louvres extendingacross the housing beneath the heating element and arranged in a curvedline conforming to the path of the air.

2. In a Ventilating unit, the combination of a housing having inlet andoutlet openings in the upper portion thereof, a heating element throughwhich the air passes downwardly and upwardly from said inlet to saidoutlet openings, and a dust separator between said heating element andthe bottom of the housing, comprising a plurality of louvres spacedapart in offset relation, and arranged in a curved line conforming tothe path of the air, each louvre being slotted longitudinally andprovided with flanges adjacent to the slot, and projecting substantiallyat right angles to the path of the air.

In witness whereof, I hereunto subscribe my name this 29th day of May,A. D. 1920.

WILFRED SHURTLEFF.

